Planer.



EULY l?F 1906.

zum MR. M, 1904.

4 SHEETS-SHEET l.

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PATENTED JULY 17, 1906.

D. L. CHANDLER.

PLANER.

APPLICATION FILED A1114. 1904.

4 SHEETS-SHEET 3.

n o @n MM xm. w... 7 2 u Q t Sn i.. ...www r--- n Hl Wma 1 mm ---I IIIW lu- I 1-1 vf I-- t :i QY\ mm l H \\..w\ mn. m, \\M..\\ \mv\ QA... ---2----- M. x 1 e mm n. M S w PATENTE- D JULY 17., 1906.

D. L. CHANDLER.

PLANER.

APPLIUATION FILED APL. 14. 1904.

4 SHEETS-SHEET 4.

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620mm/ @c the cutting stro .of prohibitive size andcost.

UNITED STATES PATENT oEEIoE.

DANIEL L. CHANDLER., F AYER, MASSACHUSETTS, ASSIGNOR TO GEORGE J. BURNS, OF AYER. MASSACHUSETTS.-A

PLANER'.

Patented July 17, 1906.

Yl'o all whom it may concern.l A' Be it known that I, DANIEL L. CHANDLER,

of Ayer, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Plners, of which the following is a specification.

This invention v`relates to laners; and its object is to'increase the speer? of operationof machines of this class in order to handle a greater .quantity -of work in a given time. That object' is accomplished, first, by the provision of improved means for accelerating the platen on its return or non-cutting stroke. Of late years in order to keep pace with the improvement in quality and durability of' planing-tools a demand has arisen for a cutting speed in planers higher than the maximum of fromf twenty to thirty feet per second, which is now considered practicable; but' the difficult encountered in speeding up irre of the platen has been that the returnor'non-cutting stroke would have to 'be initiated at acorres -ondingly slower speed and hence there wouljd be no net gain, the' reason for this being that the work of converting the forward or cutting stroke into the4 returnstroke is represented by the combined inertia of the two strokes. Accordingly a return stroke of. albout two and one-half y times the speed of the cutting stroke has been about the limit of safety, beyond which an excessive `strain w uld be placed upon the parts, to resist whic would le to make them l I have found that this ratio can be greatly exceeded by insome such speed as that required by the old ratio, then accelerating the platen to a higher speed, then retarding it under ositive control to the slower return spee at which it was started., and then reversing it onto the.

cutting stroke. By this method of acceleration and positive retardation I avoid imposing on p the mechanism which drives the platen any considerable strains greater than have `heretoforel been imposed and reater '-thancan be safely borne without un rue' increase in the size or'cost .of the driving mechanisrh, pro 'ded such mechanism is 4 properly constructed.'-.. v y

I. furthermore. provide an im roved feed mechanism 4forimparting the fee to the` cutting-tool, whereby the operator may quickly `32 of equal size.

adjust the tool by hand when this is necessary, particularly in backing out, and also an improved mechanism for varying the len th of feed of the cutting-tool while the machine is running.

Of the accompanying'drawings, Figure 1 represents a plan view of the laten, beltshifting "devices, and ,connecte parts of a planer constructed according to my invention. Eig. 2 represents a right-hand side elevation of the middle portion of the planer. Fig; 3 represents a transver vertical section. Figs, 4 tol 7, inclusive, represent side elevations showing the trip mechanism in four different positions. tail sideelevation showing one of the tripdogs elevatedv out of operative position.

The same reference characters indicate the same' parts in all the figures.

In the drawings, is the reciprocating platen adapted to hold 'the work and mounted on the usual guides. Said platen is driven bya main drive-shaft 21, having a pinion 22, meshing with a' gear 23 on the left-hand side of the planer-bed, said gear being attached to a counter-shaft 24, having a pinion 25, meshing with a gear 26, supported in bearings mounted'onlthe planer-bed frame, which enga es a rack 27, Fig. 3, on the under side of the p aten.

On the right-hand side of the planer the shaft 21fcarries a fast pulley 28,` flanked by two loose pulleys 29 30 of equal size therewith, and on the left-hand side this shaft carries a fast pulley '31, flanked by a loose pulley The pulley 28 receives motion from two belts, one of which (the'belt 33) imparts the forwarder cutting stroke to the platen through the medium of/'the gearing described, while the other belt 34'imparts the slow return movement'to the platen at the beginning and end of the non-cutting stroke. A belt 35 on the op osite side ofthe machine Fig. ,8 represents a dewhen working ont e fast pulley 31 imparts the quick return movement to the platen..

The belts 33 34 are engaged, respectively, l by belt-Shifters 36 37, ivcted 'on fixed studs' 38 39 and havin stu s 40 41 on th'eirshprt arms, Fig. 1, wor "ng in the slot of a segmental cam 42, pivoted on fixed-stud 43.1"'The TOO sliding cam 47 The cams 42 and 47 are cnnected across by a link 48.

A link 49, pivoted to the cam 42, connects the latter with a bell-crank-shaped trip-lever 56, pivoted to the side of the planer-bed 51; This lever carries a stud 52, adapted to be,` engiaged by dogs on the platen at opposite en s of the latters stroke.

53 is an inclined dog on the platen adapted to lift thestud 52, throwing oli the cuttingbelt and throwing on the slow-return' belt, the said dog operating at the end of the cutting stroke of the platen toward the right as viewed in Figs. 4 to 7.

54fis asecond dog, inclined `in the opposite direction to the dog 53 and adapted-.to still fur-ther lift stud 52, said dog 54 operating shortly after the commencement of the return stroke and serving to throw oil the slowreturn belt and throw on the quick-returnb elt. 'The dog 54 is mounted on a vertical slide 55, sol that during the latter part of the cutt'inor stroke ofthe platen toward the right the stud 52 may lift the dog 54 and the latter will drop back into positin to encounter the stud 52 after the lcommencement ofthe return stroke. The dogsI 53 54 are mounted upon a common support 56, adjustable lengthwise of the platen 4by Lbolt 57 and slot 58 alter the usual man' mined.

ner of .the belt-shifting dogs-on planers, Where- Y by the length of stroke oi the platen vis deter- 1 '59 'is a rop pivoted tothe support 56 land l adapted o vengage the'slide 55 and holdv the same in yan elevated uposition, as shown in Fig. x8, when it is desired to throw the dog 54 out of -Jche platen of vstud 52 and make the quick-return 'belt inoperative-as, Vjfor exampf1e,}on short work. I

66 is a dog adapted to encounter the stud .-52 nearfthe completion of the -return stroke land -tlhrowfthe quick-return belt oiiand, the slow-return belt on.

I6l fis a dog which encounters .the stud'52 at the termination of the return stroke and -re-r verses the lplaten from .slow-return to cutting strokel ,Y i A r'lhe dogs 60 A61 are formed ona su port 62 f adjustable 'lengthwise of the of 'bolts ,63 in the slot 58.

plateny `y means the, 'laten-20 is finishingthe cutting '.stroke, v1t wil be understood that the cams 42 47 4are in the opposite extreme of their Inovernent Jlromi'fhat shown in Fi 1-. 40 of the belt-shifter 36 for t'A e cutting-heult 43 zis fthen yina non-concentric portieri 64 Lof; 'the groove of cam 42, and the stud 41 ofi-the i -sloW-return-belt shifter 37 isin'a `concentric l portion 165 of theca-mroove.

y one in'operationa-t this time.

The stud 46y for nthe quick-return-be t shifter 44 "is inthe parallel l'portion 66 ofthe groove ofzcarn 47.

'he cutting-belt will therefore `be the only The stud 52 of'tr'ip-lever 50. Khas its most depressed po- -intermediate stageJ rIhe Estud Sitin, as represented in Fig. 4, and is .about seams to ride up on the dog 33. By doing so the trip-lever50 is thrown to the position shown in Fig. 5, causing the stud 40 to occupy'a concentric portion 67 of the slot of cam 42 and the stud 41 to occupy an eccentric portion 68 of the cam-slot, whereby the cutting-belt is thrown off of the tight pulley 28 by belt-shifter 36 and the slow-return belt is thrown onto said pulley bythe belt-'shifter 37. The stud 46-remains in the parallel party 66 ofthe slot of cam 47. By the reversal of motion of the planer-bed on its return or nonl cutting movement the stud 52 is thrown up by the do 54 and the cams 42 47 thereby moved to t eir extreme position. (Represented inFig 1.) The stud41ridesintoaconcenf vtric portion 69 of the slot of camy 42 from the eccentric portion 68 of said slot and the stud #from the loose pulley 30 to the fast pulley 28.

It will be observed that the platen 20 is thereby positively connected with its slowspeed driving .device or belt 34. The s eed,

'of the platen is thereby reduced throng an before Vreversing onto the cutting stroke, w ch is accomplished by the dog Gil. encountering stud v,52and effecting a shiitin of the parts the reversey of thateifected by dog 53, the slow-s eed-return belt being shifted from fast pu leyy 28 toloose pulley 30 and the cutting-belt shifted from loose pulley 29- to fast pulley 28. In the iigures ofthe drawin s the trip-dogs 53 54 are for compactness of ilustration shown much nearer to the dogs 60 'lthan they would `usually be in practice.

Itl will be observed that the several drivin belts are successively and automatically7 vbrought into exclusive and positive rdriving connection with the ,platen-that -`is, each belt has positive .control of the platen vwhen in position .and also exclusive control, the other belts being then out of o erative position.

tin-ltool 72 andfedby a screw 7-3,`.}.ournaled in t e vertically-adjustable beam 74 and o erating in a nut on the cutter-saddle in t'lIie usual manner. 'On the end of screw 73 -is a ppion 75, meshing with agear 76, to which 4is ed a toothed ratchet-wheel 77; -Heretofore this ratchet-wheel has usually been fed '71 is lthe cross-feed sa dle carrying'the cutroo iro

step lby step by an ordinary pawl yieldingly4 in contact with the ratchet. With such a construction when it becomes lnecessary to back out the tool 72 #by h;aI.'1 l-that is,

. fitting a crank to 'the squared end of themove it in a direction-contrary tothe feed-by screw 73 the operator has been required to lpivoted to the lift tlie pawl and rotate the crank andfscrew, the operation being a somewhat difficult and time-consuming one and usuall requiring the op'erators two hands to per orm 1t; but

by the improved construction now to be described I avoid the diflicult operation heretofore required and` allow the ower-feed to be released and the tool backe .out with one hand. On the sleeve 78, to which the gear 76 and ratchet 77 areiixed, is mounted a pawlsupport 79, havingv a split hub 80 frictionally embracing the sleeve 78.

81, Fig. 2, is the usual cross-feed rack operated by link 82, lever 83, and link 84 on a wrist 85 on the friction-collar 86 embracing a drinn 87 on the shaft 24. The rack V81- meshes with a pinion on a short shaft 89, carried by the beam 74. On theiouter end of this shaft is affixed an armor finger 90, adapted to engage heels or projections 91 on thel shafts o two oppositely acting pawls 92, 'ctionV-,support v79.` These awls have substantially-ra al noses engage ying the teeth of ratchet v77 and are yprovided with projections 93, connected by a s ring 94, which tends to throw the awls out o engage,

ment with the teeth of t e ratchet. l Eccen-l tricsl are provided fondisabling'either pawl and allowi in the direction desired. The rack 81 receiviililg motion from friction-collar 86 oscillates t e pawl andl throws it linto e rack, the frictionof support 79 on collar 78 being such as to permit this actionto takeI `pawl and relieves the strain ontheoperative tive stroke.

.screw 73 an giving the latteraI s ht-kick ahead merely suiiicient'to relieve t e friction awl, whereupon the sp 94 retract'sthe `atter from engagement ratchet 7 7 ,and the support 79 is repractedfor-a fresh opera- It wil 'be seen that the operative pawl 92 is under strain only at the movment of feed. This strain may be relieved at operator to feedA any timeit is desired by the by hand b applying the and-crank to fbetweenratchet 7,7 and pawl 92, lwhereupon the pawl willbe automaticall released from, engagement with the ratchet y the action of itss ring 94, and the tool -wilil be' thereby free from the automatic feed and may be fed b hand in either direction.V Inertia and recoi will also in most cases be, sufficient to relieve the pawl inmediately after its feeding movement. fp Y 96 is a shaft on beam 74, s lined to gearing in the saddle 71 in thefusua manner, whereby a vertical'feedis 'imparted to the tool 72 the other'pawl to feed the tool finger 90, which engages the operative:

ngagement with ,the ratchet 77l and feeds said ratchet a distance depending upon ythe length ofstrokeof 'the upon removing the pinion 75 and substitutapinion on shaft 96 to mesh with gear 76. It Wil be understood, therefore, that my imtion by a cam-strut o erating betweenthe limbs of the'collar and aving an arm 10() alternately en aging two ins 101 102 as the drum is osciated to an fro. I mount the pin 102 upon a hand-lever 103, adjustable about the axis of shaft 24 and having a locking-pin 104 at its upperiend, ada ted to enage anyone of a segment of ho es 105 105 Iormed in the side of the planer-bed. By the foregoing 'arrangement while the planer is running the o erator-may adjust 4the stroke of rack 81 and ence the length of the crossfeed movement aty each reciprocation of the y'planer-platen from nothing to a maximum y swinging the lever`1031sjo as to brin its pin 102nearer toor farther from-the ed pin 1,01.-y`

` 1. In a planer, the combination of a bed,"

a reciprocatoryplaten, slow-speed forward and reverse acting devices located on` one side and a high-speed reverse-acting device located on the opposite side of the' b'ed, a pivote'd cam connected tofoperate said slowspeed devices, a reciprocat'ory sliding cam' connected to operate said high-speed device, a 'connection extending across the planer 'oining said cams to communicate motion om one '.tol the other"and mechanism operated b the platen for operating said vcams Ato afternately throw into and out of gear the Ysaid devices.'

2. In a planer, thecombination'o'f a recipf' rocatory' platen, devices for imparting a for- -ward movement and a plural-speed reverse movement thereto, a trip member controlling said devices, a dog on the platen acting on said trip member to move the/same at the end of the forward stroke of they platen, a sec- 'ond .do 'acting' directly 'on said trip member at the 'eginning of the return'stroke ofthe platen :and displaceable from. operative'positionl by saidtrip member on the forward movement ofI the platen, and means for actoperative position by said trip mem "er on ICO IOS

.ingion said trip member 'atthe end of the re-l I stroke thereof-and disp aceab ebodil -from an inclined surface arranged to en age an the forward movement of the platen, and means for acting on said trip member at the end of the reverse movement of the platen.

4. In a planer, the combination of a reciprocatory platen, devices for imparting a forward movement and a plural-speed reverse movement thereto, al trip member controlling said devices, a dog on the platen acting on sai-d trip member at the end of the forward stroke of the platen to move the trip mem'- ber a limited distance i-n 'one direction,a second dog'comprising a slide'displaceable bodily from operative position by said trip member on the forward movement of the platen, and operative 'at the beginning of the return stroke thereof to move the trip member farther in^the same direction, and 'means for acting on said trip member at the end of the reverse movement of the platen to move the member in the opposite direction.

5. In a planer, the combination-of a reciprocatory platen7 devices for imparting aforward movement and a plural-speed reverse movement thereto, a trip member con-trollingsaid-devices, a dog on Ithe -platen having an inclined surface arranged to engage said trip member at the end of the forward stroke of the platen, a guideway connected to said dog, a vsecond dog slidably mounted in said guideway and having a reversely-inclined surface arranged to `engage the ltrip member at the beginning of the reverse stroke of the platen, the said inclined surfaces of the dogs being adapted to 'move the trip member successive distances inone `and the samedirection, and means foracting on said `trip -member at the end ofthe reverse movement of the platen to move the member in the opposite direction.

6. In a planer, the combination of a reciprocatory platen, devices for imparting a forwa-rd movement and a 'plural-speed return movement thereto, a trip member controlling said'devices, a dog on the platen havin move said trip member at the'end o the yforward stroke of the `laten, -a -second -dog slidingly mounted| adjacent the irst do provided with a projecting lrib Iformed on its opposite sides with corres ondingly-inclined surfaces and arranged to 1 eengaged bythe trip member at the end ofthe forward stroke of the platen and be displaced thereby, said dogbeing further arranged to resume its former position after passing said trip member `and to engage the same with the inclined upper surface of said rib at the beginning of the return movement of the platen, said dogs being adapted to move the trip vmember successive distances lin one and the same direction, and means for acting on said trip member at the end of the return vmovement of the platen to move the member in the opposite direction.

7. Ina `planer, the combination ofa reci-procatory platen, driving devices for imparting a forward movement and a plural-speed return movement thereto, a trip-member consisting of a bell-crank lever having 'a substantiallyvertical arm connected to operate by its movement said devices -and a `substantially horizontal arm provided with a lateral projection, a stationary and a vertically-slidable dog carried by the platen, each having .a ca-m projection arranged at -a level to engage the lateral projection of the trip member, the cam projection on the fixed dog being inclined to raise the trip-member .projection'at the conclusion of the forward movement of the4 platen -to causea 'reversal of the driving devices, the cam :projection on the slidable dogfbeing inclinedl tothat on the fixed 'dog and having lower and upper 'surfaces, the former arranged' -to engage the trip -member projection and raise'fthe 'do' clear of said projection during the forwar' movement of the platen, and *the latterto extend beneath said proj eetion :at the beginning -of the 4return movement ofthe platen and raise the horizontal arm o'flthe trip member a further amount, the 'cam fpro-j-ection oi." said sl-idable dog being adapted to dro .Tinto place behind the trip-member proj ction after passing by the same on the forward movement of lthe zplaten, 'and means for acting on said trip-member projection at the end of the return movement ofthe platen vto move the `projection downward. l In testimony whereof I have -aixed -my signature in presence of two Witnesses. V DANIEL L. CHANDLER. I

Witnesses:

WARREN' H. A'rwoo'n, C. GLoBENsKY. 

